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3 years ago

56 is what percent of 72 Integer fraction or mixed number

Mathematics

2 answers:

Usimov [2.4K]3 years ago

7 0

Answer:

The resulting percentage is seventy seven and seven ninths, or approximately 77.78%

Step-by-step explanation:

You can solve this by dividing 56 by 72 and multiplying by 100:

56 / 72 × 100

= 7 / 9 × 100

≅ 0.7778 × 100

≅77.78%

GaryK [48]3 years ago

4 0

77.78 I think but try it

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A survey finds customers are charged incorrectly for an item 20% of the time. Suppose a customer purchases 14 items. Find the p

WITCHER [35]

Answer:

55.2% probability that the customer is charged incorrectly on at least 3 items.

Step-by-step explanation:

For each item, there are only two possible outcomes. Either it is charged incorrectly, or it is not. The probability of an item being charged incorrectly is independent from other items. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

A survey finds customers are charged incorrectly for an item 20% of the time.

This means that $p = 0.2$

Find the probability that the customer is charged incorrectly on at least 3 items.

Either the customer is charged incorrectly on 2 or less items, or he is charged on at least 3. The sum of the probabilities of these events is 1.

$P(X < 3) + P(X \geq 3) = 1$

We want $P(X \geq 3)$

$P(X \geq 3) = 1 - P(X < 3)$

In which

$P(X < 3) = P(X = 0) + P(X = 1) + P(X = 2)$

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 0) = C_{14,0}.(0.2)^{0}.(0.8)^{14} = 0.0440$

$P(X = 1) = C_{14,1}.(0.2)^{1}.(0.8)^{13} = 0.1539$

$P(X = 2) = C_{14,2}.(0.2)^{2}.(0.8)^{12} = 0.2501$

$P(X < 3) = P(X = 0) + P(X = 1) + P(X = 2) = 0.0440 + 0.1539 + 0.2501 = 0.448$

$P(X \geq 3) = 1 - P(X < 3) = 1 - 0.448 = 0.552$

55.2% probability that the customer is charged incorrectly on at least 3 items.

6 0

3 years ago

Please explain how to get answer I'm confused thanks!

Free_Kalibri [48]

The angle formed by the intersection of tangent and secant outside the circle equals half the difference of the <span>intercepted arcs.

(210 - x)/2 = 50
210 - x = 50*2
210 - x = 100
210 - 100 = x
x = 110</span>°

7 0

3 years ago

A leaf falls from the branch that is 24 feet high at a rate of 5 feet every 2 seconds. How high (relative to the ground) is the

damaskus [11]

Answer:

16.5

Step-by-step explanation:

5 ft every 2 seconds= 2.5 ft per second 3 seconds= 7.5ft

24-7.5=16.5

7 0

3 years ago

I need help with this math question!!! Thank you in advance

NemiM [27]

Answer:

Pretty sure answer is D.

Step-by-step explanation:

Hope this helps!

8 0

3 years ago

Read 2 more answers

WILL MARK BRAINIEST!! Calvin walks 5 km south, then turns and walks 8 km east. Find his distance and displacement. Explain your

slava [35]

Answer:

His distance walked is 13 km

Calvin's displacement is 5 km south and 8 km east.

Step-by-step explanation:

5 km + 8 km = 13 km

Because South and East are perpendicular, they do not contradict each other, such as North and South, or East and West.

I hope that this helps! :)

3 0

3 years ago